On-site electromagnetic compatibility test system for large-scale equipment

Abstract

The utility model discloses an on-site electromagnetic compatibility test system for large-scale equipment, which relates to the field of electromagnetic compatibility and comprises a shell, an insulating plate and a detection module. Mounting holes are formed in two opposite side surfaces of the shell; the insulating plate is detachably fixed on the side surface of the shell through the mounting hole; the detection module is detachably fixed on the insulating plate and is arranged in the shell; the detection module is respectively connected with three-phase power, equipment to be subjected to electromagnetic compatibility test and the ground; the detection module is used for providing variable-parameter capacitance values and inductance values for equipment to be subjected to electromagnetic compatibility testing. According to the utility model, the efficiency of carrying out electromagnetic compatibility test on field equipment can be improved.

Description

Technical Field

[0001] The utility model relates to the field of electromagnetic compatibility, in particular to an on-site electromagnetic compatibility test system for large equipment. Background Art

[0002] Filters are widely used in industrial three-phase three-wire high-power equipment, such as photovoltaics, machine tools and other industries. Since the equipment type and the overall machine design of each customer are different, the filters required to pass the relevant electromagnetic compatibility tests will also be different, requiring engineers to adjust the filter parameters on site. Utility Model Content

[0003] The utility model aims to provide a large-scale equipment on-site electromagnetic compatibility test system, which can improve the efficiency of electromagnetic compatibility testing of on-site equipment.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] A large-scale equipment on-site electromagnetic compatibility test system, the test system comprising: a housing, an insulating plate and a detection module;

[0006] Two opposite sides of the housing are provided with mounting openings;

[0007] The insulating plate is detachably fixed to the side surface of the housing through the mounting opening;

[0008] The detection module is detachably fixed on the insulating board and is arranged inside the shell; the detection module is respectively connected to the three-phase power, the equipment to be tested for electromagnetic compatibility and the ground; the detection module is used to provide capacitance and inductance values ​​with variable parameters for the equipment to be tested for electromagnetic compatibility.

[0009] Optionally, the detection module includes a wire, a magnetic ring and a plurality of capacitor boxes;

[0010] The wire is detachably fixed to the insulating plate; one end of the wire is electrically connected to the three-phase wire; the other end of the wire is connected to the device to be tested for electromagnetic compatibility;

[0011] The magnetic ring is detachably sleeved on the wire;

[0012] One end of each of the capacitor boxes is detachably connected to the wire; the other end of each of the capacitor boxes is detachably connected to the ground; and each of the capacitor boxes is used to provide a capacitance value with variable parameters for the device to be tested for electromagnetic compatibility.

[0013] Optionally, the capacitor box includes an inter-electrode resistance module, an inter-electrode capacitance module with adjustable capacitance value parameters, and a ground capacitance module with adjustable capacitance value parameters;

[0014] The inter-electrical capacitance module includes a plurality of inter-electrical capacitance sub-modules; the inter-electrical capacitance sub-module includes an inter-electrical capacitance switch and a plurality of inter-electrical capacitances; one end of each of the inter-electrical capacitances is connected to one end of the inter-electrical capacitance switch; the other end of the inter-electrical capacitance switch is star-connected to obtain a common end; the other end of each of the inter-electrical capacitances is electrically connected to the three-phase;

[0015] The inter-electrical resistance module includes a plurality of inter-electrical resistance sub-modules; the inter-electrical resistance sub-module includes a plurality of inter-electrical resistors; one end of each of the inter-electrical resistors is connected to the common end; the other end of each of the inter-electrical resistors is electrically connected to the three-phase;

[0016] The ground capacitance module includes multiple ground capacitors and multiple ground capacitance switches; one end of each of the ground capacitance switches is connected to the common end; the other end of each of the ground capacitance switches is respectively connected to one end of the corresponding ground capacitor; the other end of each of the ground capacitors is connected to the ground.

[0017] Optionally, the plurality of capacitor boxes include a first capacitor box, a second capacitor box, a third capacitor box and a fourth capacitor box; the magnetic ring includes a first common mode magnetic ring, a second common mode magnetic ring and a differential mode magnetic ring; the differential mode magnetic ring includes a first differential mode magnetic ring, a second differential mode magnetic ring and a third differential mode magnetic ring;

[0018] The conducting wires are respectively connected to the first capacitor box, the second capacitor box, the third capacitor box, the fourth capacitor box and the device to be tested for electromagnetic compatibility in sequence; the first common mode magnetic ring is sleeved on the conducting wire between the first capacitor box and the second capacitor box; the second common mode magnetic ring is sleeved on the conducting wire between the second capacitor box and the third capacitor box; and the differential mode magnetic ring is sleeved on the conducting wire between the third capacitor box and the fourth capacitor box.

[0019] Optionally, a connection opening is provided on the wire; the capacitor box is provided with a quick plug; the quick plug is detachably connected to the wire by being inserted into the connection opening.

[0020] Optionally, one end of the wire passes through an insulating plate on one side of the housing; and the other end of the wire passes through an insulating plate on another side of the housing opposite to the one side.

[0021] Optionally, the shell is a square structure; the shell includes a shell cover and a shell; the shell includes a front, a rear side opposite to the front, and two side surfaces perpendicular to the front and the rear side respectively; the shell cover is fixedly connected to the rear side of the shell on one side by a hinge; the other side of the shell cover is fixedly connected to the front of the shell by a lock; the mounting openings on each side surface include a bottom side, a first side and a second side perpendicular to the bottom side; the bottom side, the first side and the second side are all provided with grooves; the insulating plate is fixed to the side surface by being inserted into the groove.

[0022] According to the specific embodiments provided by the utility model, the utility model discloses the following technical effects:

[0023] The utility model designs an on-site electromagnetic compatibility test system for large equipment into three parts: an outer shell insulation board and a detection module, and arranges a mounting opening on the side of the outer shell so that the insulation board cooperates with the mounting opening to be detachably fixed on the side of the outer shell; then, the detection module is detachably fixed on the insulation board and arranged inside the outer shell; the detection module is respectively connected to three-phase electricity, equipment to be tested for electromagnetic compatibility and ground, and is used to provide a capacitance value and an inductance value with variable parameters for the equipment to be tested for electromagnetic compatibility, thereby realizing on-site electromagnetic compatibility testing of the equipment to be tested for electromagnetic compatibility, and improving the efficiency of electromagnetic compatibility testing of the on-site equipment through the detachably connected detection module and the capacitance value and inductance value with variable parameters provided by the detection module. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 This is a schematic diagram of the appearance of the on-site electromagnetic compatibility test system for large-scale equipment of the utility model;

[0026] Figure 2 This is a side view of the on-site electromagnetic compatibility test system for large equipment of the utility model;

[0027] Figure 3 This is a front view of the interior of the utility model large-scale equipment on-site electromagnetic compatibility test system after the capacitor box is inserted;

[0028] Figure 4 This is the internal side view of the utility model large-scale equipment on-site electromagnetic compatibility test system after the capacitor box is inserted;

[0029] Figure 5This is a side view of the capacitor box in the utility model's large-scale equipment on-site electromagnetic compatibility test system;

[0030] Figure 6 It is a top view of the capacitor box in the on-site electromagnetic compatibility test system of large equipment of the utility model;

[0031] Figure 7 This is a front view of the capacitor box in the utility model large-scale equipment on-site electromagnetic compatibility test system;

[0032] Figure 8 This is a side view of another capacitor box in the utility model large-scale equipment on-site electromagnetic compatibility test system;

[0033] Fig. 9 This is a front view of the interior of the utility model large-scale equipment on-site electromagnetic compatibility test system without the capacitor box inserted;

[0034] Fig.10 This is a side view of the interior of the utility model large-scale equipment on-site electromagnetic compatibility test system without the capacitor box inserted;

[0035] Fig.11 This is the circuit schematic diagram of the capacitor box in the on-site electromagnetic compatibility test system for large-scale equipment of the utility model;

[0036] Fig.12 This is a typical circuit schematic diagram for electromagnetic compatibility testing.

[0037] Description of reference numerals:

[0038] Lock buckle—1, shell cover—2, insulating plate—3, wire—4, side of shell—5, front of shell—6, handle—7, electrical switch button—8, ground switch button—9, ground wire jack—10, quick plug—11. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The utility model aims to provide a large-scale equipment on-site electromagnetic compatibility test system, which can improve the efficiency of electromagnetic compatibility testing of on-site equipment.

[0041] The utility model enables engineers who conduct electromagnetic compatibility tests on site to quickly and accurately determine the parameters of the filter required by each customer's equipment.

[0042] The utility model designs a test system for on-site electromagnetic compatibility testing based on the typical circuit of the AC filter of the current industrial three-phase three-wire high-power equipment, and the current range covers 600A-2000A. The utility model meets the needs of on-site electromagnetic compatibility testing by quickly adjusting the parameters of inductance and capacitance in the test system, and provides a basis for product finalization.

[0043] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Embodiment 1

[0045] like Figure 1-Figure 10 As shown, the utility model provides an on-site electromagnetic compatibility test system for large equipment, and the test system includes: a housing, an insulating plate 3 and a detection module.

[0046] Two opposite sides of the shell are provided with installation openings; the insulating plate 3 is detachably fixed to the side surface 5 of the shell through the installation openings; the detection module is detachably fixed to the insulating plate 3 and is arranged inside the shell; the detection module is respectively connected to three-phase electricity, the equipment to be tested for electromagnetic compatibility and the ground; the detection module is used to provide capacitance and inductance values ​​with variable parameters for the equipment to be tested for electromagnetic compatibility.

[0047] In practical applications, the utility model adopts a building block structure, and the parameters of the internal inductance and capacitance can be combined at will.

[0048] Specifically, the shell is a square structure; the shell includes a shell cover 2 and a shell; the shell includes a front 6 of the shell, a rear side opposite to the front, and two side surfaces perpendicular to the front and the rear side respectively; the shell cover 2 is fixedly connected to the rear side of the shell on one side by a hinge; the other side of the shell cover 2 is fixedly connected to the front 6 of the shell by a lock 1; the installation openings of each side surface include a bottom side, a first side and a second side perpendicular to the bottom side; the bottom side, the first side and the second side are all provided with grooves; the insulating plate 3 is fixed to the side surface by being inserted into the groove.

[0049] The shell is made of AlMg3. The insulating plate 3 is made of PBT or polytetrafluoroethylene. In addition, handles 7 are installed on the front 6 and the back of the shell, and the front and rear handles 7 are convenient for carrying.

[0050] Furthermore, the detection module includes a wire 4, a magnetic ring and a plurality of capacitor boxes. The wire 4 is detachably fixed on the insulating plate 3; one end of the wire 4 is electrically connected to the three-phase wire; the other end of the wire 4 is connected to the device to be tested for electromagnetic compatibility; the magnetic ring is detachably sleeved on the wire 4; one end of each capacitor box is detachably connected to the wire 4; the other end of each capacitor box is detachably connected to the ground; each capacitor box is used to provide a capacitance value with variable parameters for the device to be tested for electromagnetic compatibility.

[0051] The wire 4 is provided with a connection opening; the capacitor box is provided with a quick plug 11; the quick plug 11 is detachably connected to the wire 4 by being inserted into the connection opening. The capacitor box also includes a capacitor box shell; the quick plug 11 is provided on the lower surface of the capacitor box shell; the switch button is provided on the upper surface of the capacitor box shell; the switch button includes an electric switch button 8 and a ground switch button 9; a ground wire jack 10 is provided on the side of the capacitor box shell close to the ground switch button 9; the wire 4 is made of copper. One end of the wire 4 passes through the insulating plate 3 on one side of the shell; the other end of the wire 4 passes through the insulating plate 3 on the other side of the shell opposite to the one side. After the wire 4 passes through the two insulating plates 3, joints are left, namely the first joint and the second joint; holes are punched on the first joint and the second joint. The hole is used to connect with three-phase electricity or equipment to be tested for electromagnetic compatibility. Fixed openings are provided on both insulating plates 3; the wire 4 passes through the insulating plates 3 through the fixed openings.

[0052] The conductor 4 includes a first conductor, a second conductor and a third conductor; the first conductor, the second conductor and the third conductor are all copper bars; the copper bars include straight copper bars and bent copper bars. Specifically, the first conductor and the third conductor are both bent copper bars; the second conductor is a straight copper bar. The cross-sectional areas of the first conductor, the second conductor and the third conductor meet the current requirements. The straight bars and the bent copper bars are made of red copper and are passivated.

[0053] As a specific implementation method, Fig.11 As shown, the capacitor box includes an inter-electrode resistance module, an inter-electrode capacitance module with adjustable capacitance value parameters, and a ground capacitance module with adjustable capacitance value parameters.

[0054] The inter-electric capacitor module includes multiple inter-electric capacitor sub-modules; the inter-electric capacitor sub-module includes an inter-electric capacitor switch and multiple inter-electric capacitors; one end of each of the inter-electric capacitors is connected to one end of the inter-electric capacitor switch; the other end of the inter-electric capacitor switch is star-connected to obtain a common end; the other end of each of the inter-electric capacitors is electrically connected to the three-phase.

[0055] The inter-electrical resistance module includes a plurality of inter-electrical resistance sub-modules; the inter-electrical resistance sub-module includes a plurality of inter-electrical resistors; one end of each of the inter-electrical resistors is connected to the common end; the other end of each of the inter-electrical resistors is electrically connected to the three-phase.

[0056] The ground capacitance module includes multiple ground capacitors and multiple ground capacitance switches; one end of each of the ground capacitance switches is connected to the common end; the other end of each of the ground capacitance switches is respectively connected to one end of the corresponding ground capacitor; the other end of each of the ground capacitors is connected to the ground.

[0057] Specifically, the electrical switch button 8 corresponds to the electrical capacitance switch one by one; the ground switch button 9 corresponds to the ground capacitance switch one by one; and the ground is connected to the earth on the test system through the ground wire jack 10.

[0058] In practical applications, the inter-circuit resistors are discharge resistors, represented by the letter R, and the value of R is 2MΩ / 1.5W; the inter-circuit capacitors are: CX1, CX2, CX3 use 1.0uF; CX4, CX5, CX6 use 2.2uF; CX7, CX8, CX9, CX10, CX11, CX12 use 4.7uF; the ground capacitors are: CY1 uses 0.047uF; CY2 uses 0.1uF; CY3 uses 0.22uF; CY4 uses 0.47uF; the inter-circuit capacitor switches are: K1, K2, K3, K4 use three-pole single-throw switches; the ground capacitor switches are: K6, K7, K8, K9 use single-pole single-throw switches.

[0059] According to this parameter configuration, the capacitor box can switch the CX capacitance range to 0-12.6uF, and the CY capacitance range to 0-0.837uF. In addition, capacitor boxes with different parameter combinations can be made according to different sites, but the composition principle is the same.

[0060] As a specific implementation method, Fig.12 As shown, the multiple capacitor boxes include a first capacitor box, a second capacitor box, a third capacitor box and a fourth capacitor box; the magnetic ring includes a first common mode magnetic ring, a second common mode magnetic ring and a differential mode magnetic ring; the differential mode magnetic ring includes a first differential mode magnetic ring, a second differential mode magnetic ring and a third differential mode magnetic ring.

[0061] The conductor 4 is connected to the first capacitor box, the second capacitor box, the third capacitor box, the fourth capacitor box and the device to be tested for electromagnetic compatibility in sequence; the first common mode magnetic ring is sleeved on the conductor 4 between the first capacitor box and the second capacitor box; the second common mode magnetic ring is sleeved on the conductor 4 between the second capacitor box and the third capacitor box; the differential mode magnetic ring is sleeved on the conductor 4 between the third capacitor box and the fourth capacitor box. The first differential mode magnetic ring is sleeved on the first conductor; the second differential mode magnetic ring is sleeved on the second conductor; the third differential mode magnetic ring is sleeved on the third conductor.

[0062] In actual application, since the first wire, the second wire and the third wire all pass through the first common-mode magnetic ring and the second common-mode magnetic ring, the first wire, the second wire and the third wire are relatively close, so the first wire and the third wire are both made of bent copper bars, and the second wire is made of straight copper bars; the second capacitor box fixed between the first common-mode magnetic ring and the second common-mode magnetic ring is made of Figure 8 The structure shown in FIG. 1 is a structure in which the spacing between the quick plugs is relatively close; the first capacitor box, the third capacitor box and the fourth capacitor box are as follows Figure 5 The structure shown is relative to Figure 8 The spacing of the quick plugs in Figure 5 The spacing between the quick connectors is larger.

[0063] The differential mode inductor, i.e. the differential mode magnetic ring, and the common mode inductor, i.e. the common mode magnetic ring, need to select corresponding parameters according to the on-site conditions.

[0064] The specific assembly method of the large-scale equipment on-site electromagnetic compatibility test system provided by the utility model is as follows:

[0065] 1. First determine the parameters of the inductor magnetic ring and insert the corresponding magnetic ring into the copper bar, then insert the copper bar into the insulating plate to fix it on the metal shell, such as Figure 2 , Fig. 9 and Fig.10 shown.

[0066] 2. Insert the four sets of capacitor boxes into the corresponding sockets on the copper bar. And connect the ground wire. Figure 3-Figure 8 shown.

[0067] 3. Adjust the CX and CY parameters of each capacitor box through the switches K1, K2, K3, K4, K5, K6, K7, and K8 on the capacitor box.

[0068] 4. Close the shell cover, connect the equipment to be tested for electromagnetic compatibility, and start the electromagnetic compatibility test.

[0069] 5. Debug the CX and CY parameters of each capacitor box and the values ​​of differential mode inductance and common mode inductance. When the electromagnetic compatibility standard is met, the filter parameters of the device to be tested for electromagnetic compatibility can be obtained.

[0070] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0071] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. At the same time, for those skilled in the art, according to the ideas of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A large-scale equipment on-site electromagnetic compatibility test system, characterized in that: The test system comprises: a housing, an insulating plate and a detection module; Two opposite sides of the housing are provided with mounting openings; The insulating plate is detachably fixed to the side surface of the housing through the mounting opening; The detection module is detachably fixed on the insulating board and is arranged inside the shell; the detection module is respectively connected to the three-phase power, the equipment to be tested for electromagnetic compatibility and the ground; the detection module is used to provide capacitance and inductance values ​​with variable parameters for the equipment to be tested for electromagnetic compatibility.

2. The large-scale equipment on-site electromagnetic compatibility test system according to claim 1 is characterized in that: The detection module includes a conductor, a magnetic ring and a plurality of capacitor boxes; The wire is detachably fixed to the insulating plate; one end of the wire is electrically connected to the three-phase wire; the other end of the wire is connected to the device to be tested for electromagnetic compatibility; The magnetic ring is detachably sleeved on the wire; One end of each of the capacitor boxes is detachably connected to the wire; the other end of each of the capacitor boxes is detachably connected to the ground; and each of the capacitor boxes is used to provide a capacitance value with variable parameters for the device to be tested for electromagnetic compatibility.

3. The large-scale equipment on-site electromagnetic compatibility test system according to claim 2 is characterized in that: The capacitor box includes an inter-electrode resistance module, an inter-electrode capacitance module with adjustable capacitance value parameters, and a ground capacitance module with adjustable capacitance value parameters; The inter-electrical capacitance module includes a plurality of inter-electrical capacitance sub-modules; the inter-electrical capacitance sub-module includes an inter-electrical capacitance switch and a plurality of inter-electrical capacitances; one end of each of the inter-electrical capacitances is connected to one end of the inter-electrical capacitance switch; the other end of the inter-electrical capacitance switch is star-connected to obtain a common end; the other end of each of the inter-electrical capacitances is electrically connected to the three-phase; The inter-electrical resistance module includes a plurality of inter-electrical resistance sub-modules; the inter-electrical resistance sub-module includes a plurality of inter-electrical resistors; one end of each of the inter-electrical resistors is connected to the common end; the other end of each of the inter-electrical resistors is electrically connected to the three-phase; The ground capacitance module includes multiple ground capacitors and multiple ground capacitance switches; one end of each of the ground capacitance switches is connected to the common end; the other end of each of the ground capacitance switches is respectively connected to one end of the corresponding ground capacitor; the other end of each of the ground capacitors is connected to the ground.

4. The large-scale equipment on-site electromagnetic compatibility test system according to claim 2 is characterized in that: The plurality of capacitor boxes include a first capacitor box, a second capacitor box, a third capacitor box and a fourth capacitor box; the magnetic ring includes a first common mode magnetic ring, a second common mode magnetic ring and a differential mode magnetic ring; the differential mode magnetic ring includes a first differential mode magnetic ring, a second differential mode magnetic ring and a third differential mode magnetic ring; The wire is respectively connected to the first capacitor box, the second capacitor box, the third capacitor box, the fourth capacitor box and the device to be tested for electromagnetic compatibility in sequence; the first common mode magnetic ring is sleeved on the wire between the first capacitor box and the second capacitor box; The second common mode magnetic ring is sleeved on the conductive line between the second capacitor box and the third capacitor box; the differential mode magnetic ring is sleeved on the conductive line between the third capacitor box and the fourth capacitor box.

5. The large-scale equipment on-site electromagnetic compatibility test system according to claim 2, characterized in that: The wire is provided with a connection opening; the capacitor box is provided with a quick plug; the quick plug is detachably connected to the wire by being inserted into the connection opening.

6. The large-scale equipment on-site electromagnetic compatibility test system according to claim 2 is characterized in that: One end of the wire passes through an insulating plate on one side of the housing; the other end of the wire passes through an insulating plate on another side of the housing opposite to the one side.

7. The large-scale equipment on-site electromagnetic compatibility test system according to claim 1, characterized in that: The shell is a square structure; the shell includes a shell cover and a shell; the shell includes a front, a rear side opposite to the front, and two side sides respectively perpendicular to the front and the rear side; the shell cover is fixedly connected to the rear side of the shell on one side by a hinge; the other side of the shell cover is fixedly connected to the front of the shell by a lock; the installation openings of each side include a bottom side, a first side and a second side perpendicular to the bottom side; the bottom side, the first side and the second side are all provided with grooves; the insulating plate is fixed to the side by inserting into the groove.

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